Cache config date (#47). (#48)
Cache config date (#47). (#48)

* Cache config date (#47).

* Merge if branches.

Formlabs/tbb,wjakob/tbb,wjakob/tbb,Formlabs/tbb,wjakob/tbb,wjakob/tbb,wjakob/tbb,wjakob/tbb,wjakob/tbb,Formlabs/tbb,Formlabs/tbb,Formlabs/tbb,Formlabs/tbb,Formlabs/tbb